Coleopterological Notices^ VII. 327 



This species is allied to obliquus, differing in the smaller and 

 less dilated prothorax with very much narrower base, and in the 

 much less ventricose male, the differences between the sexes 

 being apparently more pronounced than in that species. Four 

 specimens, 



23. B. opacicollis n. sp. — Rather strongly ventricose, dull, the frontal 

 regions and elytra more shining, deep black, the pronotum with a decided 

 bluish lustre. Read moderately stout and elongate, the vertex feebly, trans- 

 versely wrinkled anteriorly ; gente feebly developed, ^Aith a minute angular 

 notch ; supra-orbital ridges moderate, declivous internally; antennae slender, 

 ^ as long as the body, slightly stouter toward base, the first joint thickened 

 but much shorter than the next two. Prothorax relatively moderate in size, 

 as long as wide, inflated and evenly and rather strongly rounded anteriorly, 

 not at all subangulate before the middle, the sides oblique posteriorly and 

 only just visibly sinuate near the base ; angles much more than right and not 

 blunt; base rather narrow, }2 the maximum width and barely as wide as -the 

 head; disk nearly flat, the impressions all feeble; reflexed side margins mod- 

 erate. Elytra almost evenly but broadly elliptical, ^3 longer than wide, 

 bately 3 times as long as the prothorax and 2^5 times as wide, strongly con- 

 vex, somewhat full at the humeri, the reflexed margins narrow; disk coarsely 

 and deeply striate, the punctures fine and widely separated; intervals strongly 

 convex, frequently interrupted even toward the suture and very much broken 

 up broadly toward the sides, but with the striae distinctly traceable through- 

 out. Length 1.").5 mm. ; width 6.7-7.0 mm. 



Oregon. 



The male described above has the pubescent pad of the first 

 anterior tarsal joint extending through somewhat more than 

 apical third. The female has the elytra almost precisely similar 

 throughout to those of the male and equall^y inflated, but a little 

 more elongate-elliptical and rather less full at the humeri, the 

 prothorax similar in form but distinctly smaller both actually 

 and relativel3^ The species may be known from the preceding 

 not only by the similarity of elytral inflation of male and female, 

 but by the flatter and more opaque disk of the pronotum, the 

 latter being relatively much larger in the male and with the 

 median line less impressed. A single pair, 



24. B. sciilptipeiinis n. sp. — Eather strongly ventricose, alutaceous, 

 the elytra shining, the pronotum with scarcely a trace of bluish lustre; body 

 deep black throughout. Read moderately stout and elongate, the vertex feebly, 

 transversely rugulose anteriorly; supra-orbital ridges fine and rather feeble 

 but becoming strong, subangulate and moderately sloping internally at the 

 antennae; gense with a distinct obtusely angulate notch; antennae ^ as long as 

 the body, slightly thickened toward base, the first joint shorter than the next 



